Development and Verification of a Simulation Model for 120 kW Class Electric AWD (All-Wheel-Drive) Tractor during Driving Operation

Seung-Yun Baek, Yeon-Soo Kim, Wan-Soo Kim, Seung-Min Baek and Yong-Joo Kim
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Seung-Yun Baek: Department of Biosystems Machinery Engineering, Chungnam National University, Daejeon 34134, Korea
Yeon-Soo Kim: Department of Biosystems Machinery Engineering, Chungnam National University, Daejeon 34134, Korea
Wan-Soo Kim: Department of Biosystems Machinery Engineering, Chungnam National University, Daejeon 34134, Korea
Seung-Min Baek: Department of Biosystems Machinery Engineering, Chungnam National University, Daejeon 34134, Korea
Yong-Joo Kim: Department of Biosystems Machinery Engineering, Chungnam National University, Daejeon 34134, Korea

Energies, 2020, vol. 13, issue 10, 1-15

Abstract: This study was conducted to develop a simulation model of a 120 kW class electric all-wheel-drive (AWD) tractor and verify the model by comparing the measurement and simulation results. The platform was developed based on the power transmission system, including batteries, electric motors, reducers, wheels, and a charging system composed of a generator, an AC/DC converter, and chargers on each axle. The data measurement system was installed on the platform, consisting of an analog (current) and a digital part (rotational speed of electric motors and voltage and SOC (state of charge) level of batteries) by a CAN (controller area network) bus. The axle torque was calculated using the current and torque curves of the electric motor. The simulation model was developed by 1D simulation software and used axle torque and vehicle velocity data to create the simulation conditions. To compare the results of the simulation, a driving test using the platform was performed at a ground speed of 10 km/h in off- and on-road conditions. The similarities between the results were analyzed using statistical software and we found no significant difference in axle torque data. The simulation model was considered to be highly reliable given the change rate and average value of the SOC level. Using the simulation model, the workable time of driving operation was estimated to be about six hours and the workable time of plow tillage was estimated to be about 2.4 h. The results showed that the capacity of the battery is slightly low for plow tillage. However, in future studies, the electric AWD tractor performance could be improved through battery optimization through simulation under various conditions.

Keywords: electric AWD tractor; SOC level; simulation model; load measurement system; driving test (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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